Tag: spam
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Tendency for DDoS attacks to become less volumetric fits in a wider trend
A current trend sees DDoS attacks focusing less on large volume attacks and more on attacks that exhaust server resources, Cloudflare reports . The number of layer 7 attacks per day. Source: Cloudflare. This makes sense. The purpose of a DDoS attack is to render a service unavailable, and as increased defences have made it…
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Tendency for DDoS attacks to become less volumetric fits in a wider trend
A current trend sees DDoS attacks focusing less on large volume attacks and more on attacks that exhaust server resources, Cloudflare reports . The number of layer 7 attacks per day. Source: Cloudflare. This makes sense. The purpose of a DDoS attack is to render a service unavailable, and as increased defences have made it…
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Using Mailchimp makes malware campaigns a little bit more successful
Sending one email is easy. Sending thousands or millions of emails is hard: one effect of the anti-spam infrastructure we have collectively built is that the process of sending email scales very badly (even for those who only send legitimate messages). This is why companies tend to outsource their mail delivery operations to email service…
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Using Mailchimp makes malware campaigns a little bit more successful
Sending one email is easy. Sending thousands or millions of emails is hard: one effect of the anti-spam infrastructure we have collectively built is that the process of sending email scales very badly (even for those who only send legitimate messages). This is why companies tend to outsource their mail delivery operations to email service…
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Necurs pump-and-dump spam campaign pushes obscure cryptocurrency
Cryptocurrencies have attracted the attention of cybercriminals for many years: as a relatively anonymous payment channel, as a target of their digital theft, and as a way to turn (temporarily) compromised systems into money-generating machines. Given the recent increases in the value of many such cryptocurrencies, it is not surprising to see them being promoted…
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Necurs pump-and-dump spam campaign pushes obscure cryptocurrency
Cryptocurrencies have attracted the attention of cybercriminals for many years: as a relatively anonymous payment channel, as a target of their digital theft, and as a way to turn (temporarily) compromised systems into money-generating machines. Given the recent increases in the value of many such cryptocurrencies, it is not surprising to see them being promoted…
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VB2017 paper: Peering into spam botnets
Spam continues to be an important infection vector for many malware campaigns, but while a lot of attention is paid to the payloads delivered by these campaigns – Andrew Brandt’s VB2017 talk on Trickbot being just one of many examples – few researchers study the botnets used to send the emails. Bucking that trend are CERT…
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VB2017 paper: Peering into spam botnets
Spam continues to be an important infection vector for many malware campaigns, but while a lot of attention is paid to the payloads delivered by these campaigns – Andrew Brandt’s VB2017 talk on Trickbot being just one of many examples – few researchers study the botnets used to send the emails. Bucking that trend are CERT…
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Massive data breach confirms what you already knew: you are getting spam
The security community spends a lot of time and effort researching the infrastructure used by spammers to send billions of unwanted and often malicious emails every day – but there is something else spammers need in order to send you their emails: your email address. Security researcher Benoît Ancel’s recent discovery of various databases used by…
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Massive data breach confirms what you already knew: you are getting spam
The security community spends a lot of time and effort researching the infrastructure used by spammers to send billions of unwanted and often malicious emails every day – but there is something else spammers need in order to send you their emails: your email address. Security researcher Benoît Ancel’s recent discovery of various databases used by…